In China,oil shale resource is enriched in Mesozoic and Cenozoic strata,which dedicates 77.76%((5 597.92)×10~8 tons) and 14.62%(1 052.31×10~8 tons) of the total resources of China,respectively. The age of the oil shale in the northwest is younger than the southeast.

It is manifested by the first nationwide oil shale resource appraisement that the key parameters for the oil shale quality assessment are mainly concerned with oil yield(ω),desiccation-based ash productivity(A~g),lower thermal value(Q~~g__(DW)) and whole-sulphur percentage(S~~g__Q).

The grade of oil shale(oil yield) ranges from middling to good. Oil shale resources of middling grade(>5%~10%) took 37%((2 664.35)×10~8 tons) of national total resources and the good grade(exceed 10%) took 18%(1 267×10~8 tons).

It is known that resources of oil shale are abundant both in theU.S.A.and China.The overall oil yield in the conventional combus-tion retorting process is substantially lower than that obtained under la-boratory condition.Especially for retorting of low grade oil shale,a sub-stantial amount of product oil is burned to supply the heat requiredfor retorting.This further lowers the yield,making the oil recovery evenless economical.Therefore it is our goal to develop a method to recoverthe oil as much as possible...

It is known that resources of oil shale are abundant both in theU.S.A.and China.The overall oil yield in the conventional combus-tion retorting process is substantially lower than that obtained under la-boratory condition.Especially for retorting of low grade oil shale,a sub-stantial amount of product oil is burned to supply the heat requiredfor retorting.This further lowers the yield,making the oil recovery evenless economical.Therefore it is our goal to develop a method to recoverthe oil as much as possible from low grade oil shale by adding a smallamount of coal.The idea is to supply thermal energy by burning coalinstead of burning product oil which will in turn improve the oil yield.The effect of the amount of coal added has been studied for various flowrates of air and different grades of oil shale.The results show that oil yield is increased by as much as 40% with3%(w)of coal added.The distance between the combustion and the re-torting zone is enlarged with the addition of coal.Therefore,this studyhas verified that the addition of coal not only increases the oil yield ofthe low grade oil shale but also improves the retorting condition.

By proceeding with analyzing the characters of atmospheric po- ution in China,It probes the rational utilzition way of coal and oil shale resources and makes comparisons on various methods of reducing SO_2 emissions from com- bustion of coal in this paper.Studies on sulphur release and retention during flu-idized bed combustion of coal and oil shale have been reviewed,and the problems to research profoundly are pointed out as the following:(1)the self-desulphurization by ash;(2)water content in coal and oil...

By proceeding with analyzing the characters of atmospheric po- ution in China,It probes the rational utilzition way of coal and oil shale resources and makes comparisons on various methods of reducing SO_2 emissions from com- bustion of coal in this paper.Studies on sulphur release and retention during flu-idized bed combustion of coal and oil shale have been reviewed,and the problems to research profoundly are pointed out as the following:(1)the self-desulphurization by ash;(2)water content in coal and oil shale affecting SO_2 capture by sorbents;(3)the influence of feeding back of volatile combustion flame energy on SO_2 transient release during oil shale particle combustion;(4)sulphur transformation mechanism and intrinsic kinetics during coal and oil shale combustion and(5)the effects of the presence of inerts on limestone sulphation.

There is a great deal of oil shale, belonging to coal series Kaolin, in a coal mine. In this study,it is considered that the metakaolin produced by dry distillation and dewatering of oil shale may be used, as an additive, to produce high-strength concrete. Yet, the oil shale in which the colourated substances are removed may be used to produce the fine Kaolin or high-quality activated silicon dioxide as well as aluminum salt products through deep processing. The comprehensive utilization...

There is a great deal of oil shale, belonging to coal series Kaolin, in a coal mine. In this study,it is considered that the metakaolin produced by dry distillation and dewatering of oil shale may be used, as an additive, to produce high-strength concrete. Yet, the oil shale in which the colourated substances are removed may be used to produce the fine Kaolin or high-quality activated silicon dioxide as well as aluminum salt products through deep processing. The comprehensive utilization of oil shale resource is main problem necessary to be solved for sustainable development of this coal mine